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Rate-sensing tuning fork design

  • US 5,476,008 A
  • Filed: 07/25/1994
  • Issued: 12/19/1995
  • Est. Priority Date: 07/25/1994
  • Status: Expired due to Fees
First Claim
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1. In a rotation rate sensor of the type that includes a generally planar and H-shaped sensor frame of piezoelectric material, said frame including a first pair of tines and a second pair of tines collectively forming legs of said H-shape, each of said first and second pairs of tines being joined to an intermediate cross-piece, the first pair of tines, the second pair of tines, and the intermediate cross-piece defining a planar configuration, the frame further including a first array of drive electrodes fixed to said first pair of tines for transmitting electrical signals for driving said first pair of tines in-plane, and a second array of pickoff electrodes fixed to said second pair of tines for transmitting electrical signals generated in said second pair of tines in response to Coriolis-induced out-of-plane bending thereof, the improvement comprising:

  • connecting means for connecting each tine of the second pair of tines to the other tine of said second pair of tines at a location spaced from said intermediate cross-piece, toward the tine ends of the second pair of tines.

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